TelnetServer.java

package com.github.nettybook.ch7.spring;

import java.net.InetSocketAddress;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Component;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;

import com.github.nettybook.ch7.TelnetServerInitializer;

@Component
public final class TelnetServer {
	@Autowired
	@Qualifier("tcpSocketAddress")
	private InetSocketAddress address;

	public void start() {
		EventLoopGroup bossGroup = new NioEventLoopGroup(1);
		EventLoopGroup workerGroup = new NioEventLoopGroup();

		try {
			ServerBootstrap b = new ServerBootstrap();
			b.group(bossGroup, workerGroup)
					.channel(NioServerSocketChannel.class)
					.childHandler(new TelnetServerInitializer());

			ChannelFuture future = b.bind(address).sync();

			future.channel().closeFuture().sync();
		}
		catch (InterruptedException e) {
			e.printStackTrace();
		}
		finally {
			bossGroup.shutdownGracefully();
			workerGroup.shutdownGracefully();
		}
	}
}